The double compensating foot is used for uniform and precise top stitching. This foot can be used for both right and left top stitching. The edge guide is spring loaded to compensate for different thickness of fabric.

Guaranteed to fit Singer Sewing Machine Models:
1300, 191D, 195K, 196K, 241, 245, 251, 281, 31, 331K, 366K, 400W, 44, 451K, 491, 591D, 600W, 660A, 771, 95, Centurion 121D

Alternate Part Numbers: 211-14, 211-15